Editing sound

I'm in the media suite looking at different sound effects on garage band that need to be incorporated into our thriller opening to make it feel more dramatic.
We've decided we need the sound effects of:

•  footsteps from our interviewer
• Scream from Iona as she is dragged away
• More dramatic sound of the door closing in the beginning scene
• We have thought about using contrapuntal music in the final scenes where the flashback shows Graham Harvey dragging Iona to create a different effect. 

Megan